Functions; Master Function (I/O Communication Function) - Mitsubishi Electric QJ71DN91 User Manual

4 FUNCTIONS

4 FUNCTIONS
This chapter explains the functions of the QJ71DN91.

4.1 Master Function (I/O Communication Function)

This function allows I/O data communication with respective slave nodes (up to 63
nodes), using the buffer memory of the QJ71DN91.
Communications of 512 bytes of inputs (up to 256 bytes per node) and 512 bytes of
outputs (up to 256 bytes per node) are available.
Programmable controller CPU
SET Y11
(1) Setting for I/O communication with each slave node
4 - 1
Master node
QJ71DN91
I/O Communication
Request
0700
H
X
MasterFunction
07FF
H
0900
H
Y
Master Function
09FF
H
(a) Set the information such as connection types or I/O points in Parameters
for Master Function (address: 01D4
each slave node.
(b) Parameters for the master function are set in the functions for DeviceNet of
GX Works2 or sequence programs. (Refer to Section 7.3.)
Slave node
Receive Data
area
Transmit Data
area
to 03CF
H
MELSEC-Q
Transmit
Receive
) to exchange I/O data with
H
4 - 1
4